Some Jewish historians including Graetz, claim that such evidence was prima facie fantastic, the Jews were the victims of a plot “set in motion,” Hofer claims, “to get rid of pressing creditors.” It is easier, howeever, to accept the evidence of blasphemy and murder than to find evidence of a plot:
"The detailed account of the robberies, the precise reports of places and times, the definite description of all persons concerned, even of accused Christians, all this must incline us to believe in the trustworthiness of the charges. . . If this whole procedure was owing to a plot, its extraordinary ingenuity and precaution become historically remarkable. "
Graetz also claims Capistrano was indirectly responsible for the trial because he inflamed the public opinion against the Jews during his Lenten sermons. Hofer, however, points out that in the 40 sermons, only one referred to the Jews. In it Capistrano urged the citizens of Breslau not to refrain from work on Saturday, lest the Jews interpret this as participation in their Sabbath celebration. Capistrano did not preach sermons on the Jews or to the Jews in Breslau because Breslau, especially in comparison to Vienna and Nueremberg, had an insignificant Jewish population. According to Hofer, “The popular conception of Capistran thundering for forty days against the Jews is the purest fiction.”
What was Capistrano’s position on the Jews? Hofer says his “general attitude towards the Jews stands out clearly in his sermons,” which according to the custom of the day, Jews were forced to attend. In those sermons, he urged Jews to convert to Christianity. “The usual imagination,” Hofer writes, “That on such occasions he aroused popular sentiment against the Jews is not true.” . . . He preached to Jews in “sorrow and disappointment” at their failure to respond to Christ’s call for conversion. He did not treat them with contempt. Like all medievals, Capistrano would have found the notion of racial hatred incomprehensible. . . One the Jew accepted baptism, there was no difference between him and a Christian.
Capistrano left Breslau after the trial and went to Poland, which had a significant jewish population and was growing steadily, and whose privileges, especially usury and tax farming would cause Poland serious problems in the coming centuries. . . According to Graetz’s account, Capistrano “threatened [King Casimer] with the punishments of hell and prophesized a bad outcome in the war against the Prussian Knights if he didn’t revoke the favorable privileges of the Jews and hand the Hussite heretics over to the bloodthirsty clergy.”
After we peel away the invective, Graetz admits the Jews had been granted privileges by the princes across central Europa. Unlike Capistrano, Graetz undoubtedly considered this good, but that is no indictment of Capistrano. . . As Graetz well knew, Jews were granted privileges not out of humanitarian concerns, they were granted privileges because they granted financial concessions to the prince, specifically loans at lower interest rates. To make money available to the prince on favorable terms, Jews were granted the privilege of lending to the burgher and peasant at usurious rates. Once Jews got the prince in his debt, they could demand other concessions too. . . Capistrano felt that the Jews, because of their rejection of Christ, and not because of their race, were a constant danger to any Christian society. His thought paralleled the thinking of popes expressed in “Sicut iudeis non.” Capistrano felt that the Jew could be tolerated but not privileged. . . Usury is one of the most debilitating forms of dependence therefore, princes should not allow Jews the privilege of taking usury. According to Hofer:
“To prevent commercial and social contacts by enforcement of the laws concerning Jews, and to abrogate all privilege that stood against this plan, was the fundamental ideal of Capistrano’s policy. How far did he succeed? That he deeply injured Jewish interests in many lands is the assertion of Jewish historians. Detailed proof of that assertion is lacking. In Italy he did succeed in having edicts issued to abrogate Jewish privileges.”
To stigmatize Capistrano as a Jew-hater because he insisted laws be enforced is a deliberate misrepresentation of the social facts of the era. Jewish involvement in usury caused problems – not the least of all for the Jews – throughout the Middle ages. “The question of Jewish privileges cannot be regarded as a war of medieval intolerance against the approaching dawn of a noble humanitarianism.”
- E. Michael Jones, 'The Jewish Revolutionary Spirit"